每台电梯机房单设的切断该电梯的主电源开关,在下列()供电电路中该装置也起作用。A、电 发布时间:2017-02-23 00:19 │ 来源:www.tikuol.com 题型:单项选择题 问题: 每台电梯机房单设的切断该电梯的主电源开关,在下列()供电电路中该装置也起作用。A、电梯井道照明B、电梯供电系统断相保护C、电梯供电系统中错相保护D、电梯接地保护
题型:单项选择题 A damaged T-Boat that is unable to meet the requirementsof its Certificate of Inspection but is able to travel to a shipyard under its own power should().A.make the trip only after obtaining a Permit to Proceed to Another Port for Repair,Form CG-948B.get underway as soon as possibleC.hire a tug and pilot insteadD.request an Expiration Certificate if the vessel displays a tendency to sink 查看答案